A mycologist visits your biology class and discusses her research on a particular fungus that lives on the bark of damaged spruce trees. She explains that the fungal hyphae of her research organism is heterokaryotic. You raise your hand and request that she define that word. Her correct response is
A. heterokaryotic means that each compartment of the hyphae contain two distinct nuclei.
B. heterokaryotic means that the nuclei of each compartment of the hyphae are genetically distinct.
C. heterokaryotic means that each compartment of the hyphae contains only one nucleus.
D. heterokaryotic means that the nuclei of the fungal hyphae are genetically the same.
Answer: B
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Answer the question using the accompanying graph. Which portion of the graph shows the free energy of the reaction?
a. A b. B c. C
d. W + X e. Y + Z
A method of genome editing that uses the Cas9 enzyme to identify and cut specific nucleotides from the genome is called ________.
A. CRISPR (clustered regularly interspaced short palindromic repeats) B. PCR (polymerase chain reaction) C. ex vivo gene therapy D. (FISH) fluorescent in-situ hybridization
Fossil evidence indicates that horses have gradually increased in size over geologic time. Which of the following terms best describes this?
A) artificial selection B) directional selection C) stabilizing selection D) disruptive selection E) sexual selection
Which of the following is a water-soluble vitamin?
A) A B) C C) D D) E E) K